Writer Chris Whipple wrote 'The Gatekeepers,' a book about the importance of chiefs of staff in the White House. Whipple says that John Kelly is nearly enough to make him nostalgic for Reince Priebus. watch

Joe Scarborough and Mika Brzezinski begin Friday's show by discussing President Trump's Thursday speech on this week's shooting in Florida where he chose to focus on mental health over gun legislation. watch

More than 130 political appointees working in the Executive Office of the President did not have permanent security clearances as of November 2017, according to internal White House documents obtained by NBC News. Ari Melber and Rick Stengel discuss. watch

Sen. Bill Nelson, D-Fla., says it is not too soon to talk about gun reform following Wednesday's mass shooting at a Florida school. Sen. Nelson also discusses the proliferation of assault-style weapons. watch